Tests for Anions
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1
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How do you test for carbonates?
* Add a few drops of dilute HCL
* Connect to limewater via delivery tube
* If limewater turns cloudy test is positive
* Connect to limewater via delivery tube
* If limewater turns cloudy test is positive
2
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Why does limewater turn cloudy if a carbonate is present?
A white precipitate is formed
3
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How do you test for sulfates?
* Add a few drops of dilute HCL and barium chloride
* If a white precipitate if formed test is positive
* If a white precipitate if formed test is positive
4
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Why is dilute HCL added when testing for sulfates?
To remove any carbonates
5
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How do you test for halides?
Add a few drops of nitric acid and silver nitrate
6
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What is the colour of a chloride precipitate?
White
7
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What is the colour of a bromide precipitate?
Cream
8
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What is the colour of an iodide precipitate?
Yellow
9
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How do you test for hydrogen?
Squeaky poppy test
10
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How do you test for oxygen?
Relighting a glowing splint
11
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How do you test for carbon dioxide?
Limewater test
12
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How do you test for chlorine?
Using damp litmus paper
Note 
Flashcards (40)